*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
img{
  display: block;
  width: 100%;
}
ul{
  list-style: none;
}
// 头部
.sitenav_header{
  height: 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background:#ff841d;
  padding: 5px 8px;
  span{
    font-size: 20px;
    color:#fff;
  }
  img{
    width: 40px;
    height: 40px;
  }
}
//主体
.sitenav_content{
  padding: 5px 40px;
    a{
      display: inline-block;
      height: 40px;
      color:#000;
      font-size: 16px;
      background: #f4f4f4;
      text-align: center;
      padding: 9px;
      border: 1px solid #c5c5c5;
      margin-right:3px;
      margin-bottom: 5px; 
      img{
        width: 16px;
        height: 16px;
        display: inline-block;
        margin-right: 5px;
      }
    }

}

//底部
.footer{
  border-top: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  background: #efefef;
  .footer_btn{
    display: flex;
    border-bottom: 1px solid #ccc;
    text-align: center;
    a{
      flex: 3;
      color: #000;
      padding: 5px 15px;
      border-right: 1px solid #ccc;
    }
    .to_top{
      flex:4;
      border:none;

    }
  }
  .footer_info{
    text-align: center;
    padding-top: 10px;
    :nth-child(1){
      color: red;
    }
    :nth-child(3){
      color: #a1a1a1;
    }
    p{
      color: #a1a1a1;
    }
  }
}